Plot hole ... LSD and pharmacist/chemist

Any pharmacist (or chemist) fooling around with LSD would also know that Thorazine will bring a person down off a bad trip. Not sure which hallucinogenic was used in this story but I'm pretty sure it works with hallucinogens across the board. I'm talkin' old school here so yeah, there may be newer medications that I'm not aware of but the point is still the same. And I'm guessing that he would be sure to have some handy if hes going to mess with the stuff, its just common sense.

No matter, I still get some laughs everytime I see this.